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package org.graalvm.compiler.hotspot;

import org.graalvm.compiler.core.common.spi.ForeignCallLinkage;
import org.graalvm.compiler.core.target.Backend;
import org.graalvm.compiler.hotspot.meta.HotSpotForeignCallDescriptor;
import org.graalvm.compiler.hotspot.stubs.Stub;

import jdk.vm.ci.meta.InvokeTarget;

The details required to link a HotSpot runtime or stub call.
/**
 * The details required to link a HotSpot runtime or stub call.
 */
public interface HotSpotForeignCallLinkage extends ForeignCallLinkage, InvokeTarget {

    
Constants for specifying whether a foreign call destroys or preserves registers. A foreign call will always destroy its temporary registers. /**
     * Constants for specifying whether a foreign call destroys or preserves registers. A foreign
     * call will always destroy {@link HotSpotForeignCallLinkage#getOutgoingCallingConvention() its}
     * {@linkplain ForeignCallLinkage#getTemporaries() temporary} registers.
     */
    enum RegisterEffect {
        DESTROYS_ALL_CALLER_SAVE_REGISTERS,
        COMPUTES_REGISTERS_KILLED
    }

    @Override
    HotSpotForeignCallDescriptor getDescriptor();

    
Sentinel marker for a computed jump address.
/**
     * Sentinel marker for a computed jump address.
     */
    long JUMP_ADDRESS = 0xDEADDEADBEEFBEEFL;

    void setCompiledStub(Stub stub);

    RegisterEffect getEffect();

    
Determines if this is a call to a compiled stub. /**
     * Determines if this is a call to a compiled {@linkplain Stub stub}.
     */
    boolean isCompiledStub();

    
Gets the stub, if any, this foreign call links to.
/**
     * Gets the stub, if any, this foreign call links to.
     */
    Stub getStub();

    void finalizeAddress(Backend backend);

    long getAddress();

    
Determines if the runtime function or stub might use floating point registers. If the answer
is no, then no FPU state management prologue or epilogue needs to be emitted around the call.
/**
     * Determines if the runtime function or stub might use floating point registers. If the answer
     * is no, then no FPU state management prologue or epilogue needs to be emitted around the call.
     */
    boolean mayContainFP();

    
Determines if a JavaFrameAnchor needs to be set up and torn down around this call. /**
     * Determines if a {@code JavaFrameAnchor} needs to be set up and torn down around this call.
     */
    boolean needsJavaFrameAnchor();

    
Gets the VM symbol associated with the target address of the call. /**
     * Gets the VM symbol associated with the target {@linkplain #getAddress() address} of the call.
     */
    String getSymbol();
}